Issue #1357348 by rfay: checkout page example

checkout_page_example/checkout_page_example.info

+name = Checkout Page Example
+description = Demonstrates providing an additional checkout page
+package = Commerce (contrib)
+dependencies[] = commerce_checkout
+dependencies[] = checkout_page_example
+core = 7.x

checkout_page_example/checkout_page_example.module

+<?php
+/**
+ * @file checkout_page_example.module
+ * Demonstrates the addition of a new page to the checkout system.
+ */
+
+/**
+ * Implements hook_menu().
+ *
+ * Simply presents a page that will explain what this module is for.
+ * hook_menu() has nothing to do with the checkout page functionality.
+ */
+function checkout_page_example_menu() {
+  $items['commerce_examples/checkout_page_example'] = array(
+    'title' => 'Checkout Page Example',
+    'page callback' => 'checkout_page_example_info_page',
+    'access callback' => TRUE,
+  );
+  return $items;
+}
+
+/**
+ * This function simply returns information about the example to help the
+ * user understand its purpose.
+ */
+function checkout_page_example_info_page() {
+  return array(
+    '#markup' => t('The page example adds an extra "Page Example" page to the checkout system. It also demonstrates how to alter the pages other modules have provided.'),
+  );
+}
+
+/**
+ * Implements hook_commerce_checkout_page_info().
+ *
+ * This is where we define the name of the page and related information.
+ *
+ * @link http://www.drupalcommerce.org/node/224 explains hook_commerce_checkout_page_info @endlink
+ */
+function checkout_page_example_commerce_checkout_page_info() {
+
+  $pages['checkout_page_example'] = array(
+    'name' => t('Checkout Page Example'),
+    'title' => t('Checkout Page Example'),
+    'help' => t('This is some help for the Checkout Page Example. You may not need this page in your own Commerce install :-)'),
+
+    // Determines the order of the checkout pages.
+    'weight' => 10,
+
+    // An order status is automatically created for each checkout page. It will
+    // be named 'Checkout: ' + the name of the page.
+    // If 'status_cart' is TRUE (default), then the 'cart' property of the order
+    // status will be set to true, meaning that the commerce_cart module will
+    // treat this the order as a cart at this point (price recalculations take
+    // place on reload, and other cart-oriented functions may fire.)
+    // If 'status_cart' is false, then prices are frozen on this page and
+    // recalculation does not occur.
+    'status_cart' => TRUE,
+
+    // If 'buttons' is FALSE the next and previous buttons will be omitted.
+    'buttons' => TRUE,
+
+    // The value of the "next" button for this page. Defaults to 'Continue'.
+    'submit_value' => t('Continue to a real checkout page'),
+    // The value of the "previous" button for this page. Defaults to 'Back'
+    'back_value' => t('Go back'),
+
+    );
+
+  return $pages;
+}
+
+/**
+ * Implements hook_commerce_checkout_page_info_alter().
+ *
+ * Here we can change the definitions of pages that have been provided by this
+ * or other modules. This example will check the weights of other modules and
+ * then readjust our weight so it always comes first.
+ *
+ * We have the ability to reorder and rename pages, change their button names,
+ * etc.
+ *
+ * @param $pages
+ *   All the pages that have been defined.
+ */
+function checkout_page_example_commerce_checkout_page_info_alter(&$pages) {
+  $my_weight = PHP_INT_MAX;
+
+  // Walk through the weights to find the lowest weight and make ours lower.
+  foreach ($pages as $index => $page) {
+    if ($index != 'checkout_page_example' && $page['weight'] < $my_weight) {
+      $my_weight = $page['weight'] - 1;
+    }
+  }
+  $pages['checkout_page_example']['weight'] = $my_weight;
+}
+
+/**
+ * Implements hook_commerce_checkout_pane_info_alter().
+ *
+ * We'll place the example *pane* in our example *page*.
+ *
+ * @param $panes
+ *   All the panes that have been defined.
+ */
+function checkout_page_example_commerce_checkout_pane_info_alter(&$panes) {
+  $panes['checkout_pane_example']['page'] = 'checkout_page_example';
+}
\ No newline at end of file

pane_example/checkout_pane_example.module → checkout_pane_example/checkout_pane_example.module

@@ -12,7 +12,7 @@
  */
 function checkout_pane_example_menu() {
   $items['commerce_examples/checkout_pane_example'] = array(
-    'title' => 'Pane Example',
+    'title' => 'Checkout Pane Example',
     'page callback' => 'checkout_pane_example_info_page',
     'access callback' => TRUE,
   );
@@ -39,7 +39,7 @@ function checkout_pane_example_info_page() {
 function checkout_pane_example_commerce_checkout_pane_info() {
 
   $panes['checkout_pane_example'] = array(
-    'title' => t('Pane Example'),
+    'title' => t('Checkout Pane Example'),
     'base' => 'checkout_pane_example_pane',
 
     // The checkout page where this should be displayed by default.
@@ -159,11 +159,13 @@ function checkout_pane_example_pane_review($form, $form_state, $checkout_pane, $
     '#title' => t('Nickname'),
     '#markup' => check_plain($order->data['nickname']),
   );
-  $content['another_email'] = array(
-    '#type' => 'item',
-    '#title' => t('Another Email address'),
-    '#markup' => check_plain($order->data['another_email']),
-  );
+  if (!empty($order->data['another_email'])) {
+    $content['another_email'] = array(
+      '#type' => 'item',
+      '#title' => t('Another Email address'),
+      '#markup' => check_plain($order->data['another_email']),
+    );
+  }
   return drupal_render($content);
 }